Jax and Bones Molly The Mammoth Large Good Karma Rope Toy, 7" These toys act as doggie dental floss. Dip in water and freeze! Made with chemical-free natural vegetable dyes As the toys unravel, they act as doggie dental floss. If you'd like to minimize rope fray, cut off threads as they unravel. Not indestructible Made from cotton rope Machine wash and dry